Ethernet frame (read right to left) |
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FSC | Data | Type | Source | Destination | SOF | Preamble |
Frame Check Sequence | Data to be handed to the upper layer protocol | Defines which upper layer protocol will receive the packet | MAC Address | MAC Address | Start of Frame | Beginning of the frame |
4 bytes | 46-1500 bytes | 2 bytes | 6 bytes | 6 bytes | 1 byte | 7 bytes |
IEEE 802.3
802.3 frame (read right to left) |
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FSC | Data | Length | Source | Destination | SOF | Preamble |
Frame Check Sequence | Contains 802.2 header and the encapsulated data to be passed to an upper layer protocol that is defined in data field | Defines how many bytes the 802.2 header and data field is | MAC Address | MAC Address | Used to synchronize the frame reception portions of all the machines on the segment | Beginning of the frame |
4 bytes | 46-1500 bytes | 2 bytes | 6 bytes | 6 bytes | 1 byte | 7 bytes |
Tokens
Token Frame (read right to left) |
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End Delimiter | Access control | Start Delimiter |
Indicates end of frame | Defines frame type | Indicate start of frame |
1 byte | 1 byte | 1 byte |
Data / Control Frame (read right to left) |
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Frame Status | End Delimiter | FCS | Data | Source | Destination | Frame Control | Access Control | Start Delimiter |
Can relay 2 statuses Frame copied or address recognized | Indicates end of frame | Error checking, used in CRC calculations | All data that is to be encapsulated. length is determined by how long the station can hold a token | Packet's address | Packet's address | Info Regarding Frame Control | Assigns Priority to the frame, distinguishes frame type | Alerts each station that the frame is Data/Control Frame |
1 byte | 1 byte | 1 byte | varies | 6 bytes | 6 bytes | 1 byte | 1 byte | 1 byte |
Specifications
PPP frame (read right to left) |
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FCS | Data | Protocol | Control | Address | Flag |
Used for CRC calculations | Information handled by the upper layer protocols | Indicates the encapsulated data's protocol | Request a transmission of user data | Holds a broadcast address | Specifies beginning of frame |
1 byte | varies | 2 bytes | 1 byte | 1 byte | 1 byte |
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